shell/ batch scripting to direct commands to adb shell

Question

I am trying to write a batch(for win) and a shell script for linux to automate key and touch events on a android UI. At the moment in a windows batch file I am starting a adb shell for each event for eg

    :again

adb shell am start -a android.intent.action.MAIN -n com.q.me.fui.activity/.InitActivity

sleep 15

adb shell sendevent /dev/input/event0 3 0 281
adb shell sendevent /dev/input/event0 3 1 70
adb shell sendevent /dev/input/event0 1 330 1
adb shell sendevent /dev/input/event0 0 0 0
adb shell sendevent /dev/input/event0 1 330 0
adb shell sendevent /dev/input/event0 0 0 0   
adb shell sendevent /dev/input/event0 1 330 1
adb shell sendevent /dev/input/event0 0 0 0
adb shell sendevent /dev/input/event0 1 330 0
adb shell sendevent /dev/input/event0 0 0 0
adb shell sendevent /dev/input/event0 0 0 0
adb shell sendevent /dev/input/event0 0 0 0   

sleep 5

adb shell input keyevent 82
adb shell input keyevent 20
adb shell input keyevent 20
adb shell input keyevent 22
adb shell input keyevent 22
adb shell input keyevent 22
adb shell input keyevent 66

sleep 5

goto again

The above code is infact starting a new adb shell each time. I want to avoid this. I want my batch script to start the adb shell only once and I would like to route the sendevent and other commands to the subshell, ie the adb shell.

Any idea how I can do this in win batch and Lin shell script. I have tried a few options but they dont seem to work :(

Thanks in advance.

Answer 1

I don't know much about batch scripting or shell scripting, but I was quickly able to quickly write a java program to do this:

import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;

public class AndroidShell  {
   private ProcessBuilder builder;
   private Process adb;
   private static final byte[] LS = "\n".getBytes();

   private OutputStream processInput;
   private InputStream processOutput;

   private Thread t;

   /**
    * Starts the shell 
    */
   public void start() throws IOException  {
      builder = new ProcessBuilder("adb", "shell");
      adb = builder.start();

      // reads from the process output
      processInput = adb.getOutputStream();

      // sends to process's input
      processOutput = adb.getInputStream();

      // thread that reads process's output and prints it to system.out
      Thread t = new Thread() {
         public void run() {
            try   {
               int c = 0;
               byte[] buffer = new byte[2048];
               while((c = processOutput.read(buffer)) != -1) {
                     System.out.write(buffer, 0, c);
               }
            }catch(Exception e)  {}
         }
      };
      t.start();
   }

   /**
    * Stop the shell;
    */
   public void stop()   {
      try   {
         if(processOutput != null && t != null) {
            this.execCommand("exit");
            processOutput.close();
         }
      }catch(Exception ignore)  {}
   }

   /**
    * Executes a command on the shell
    * @param adbCommand the command line.
    * e.g. "am start -a android.intent.action.MAIN -n com.q.me.fui.activity/.InitActivity" 
    */
   public void execCommand(String adbCommand) throws IOException {
      processInput.write(adbCommand.getBytes());
      processInput.write(LS);
      processInput.flush();
   }

   public static void main(String[] args) throws Exception  {
      AndroidShell shell = new AndroidShell();
      shell.start();

      for(String arg : args)  {
         if(arg.startsWith("sleep"))   {
            String sleep = arg.split(" ")[1].trim();
            long sleepTime = Integer.parseInt(sleep) * 1000;
            Thread.sleep(sleepTime);
         }else {
            shell.execCommand(arg);
         }
      }

      shell.stop();
   }
}

You can then use this class in a shell script as you like passing the commands to execute as command line arguments in your main method.

e.g. Below is the shell script:

#!/bin/bash

java AndroidShell "am start -a android.intent.action.MAIN -n com.q.me.fui.activity/.InitActivity" \
"sleep 15" \
"sendevent /dev/input/event0 3 0 281" \
"sendevent /dev/input/event0 3 1 70" \
"sendevent /dev/input/event0 1 330 1" \
"sendevent /dev/input/event0 0 0 0" \
"sleep 10" \
"sendevent /dev/input/event0 1 330 0" \
"exit"